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// Copyright 2018 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
///////////////////////////////////////////////////////////////////////////////
#ifndef TINK_PRIMITIVE_WRAPPER_H_
#define TINK_PRIMITIVE_WRAPPER_H_
#include <memory>
#include "tink/primitive_set.h"
#include "tink/util/statusor.h"
namespace crypto {
namespace tink {
// A PrimitiveWrapper knows how to wrap multiple instances of a primitive to
// a single instance, enabling key-rotation. It requires a
// PrimitiveSet<Primitive> and wraps it into a single primitive.
//
// PrimitiveWrappers need to be written for every new primitive. They can be
// registered in the registry to be fully integrated in Tink.
template <typename InputPrimitiveParam, typename PrimitiveParam>
class PrimitiveWrapper {
public:
virtual ~PrimitiveWrapper() = default;
// Useful when writing templated code.
using InputPrimitive = InputPrimitiveParam;
using Primitive = PrimitiveParam;
virtual crypto::tink::util::StatusOr<std::unique_ptr<Primitive>> Wrap(
std::unique_ptr<PrimitiveSet<InputPrimitive>> primitive_set) const = 0;
};
} // namespace tink
} // namespace crypto
#endif // TINK_PRIMITIVE_WRAPPER_H_
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